Question

... define molecule... ​

Answer 1

Answer:

A molecule is the smallest practical in a chemical element or compound that has the chemical properties of that element or compound.

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Answer 2

Answer:

The basic unit of matter in any state is considered as molecule. This is because molecule is the smallest particle of matter which has independent existence.

Also you can refer below, for more information:

• Molecule is the smallest unit into which a substance can be divided without changing its chemical nature

• Molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance. Several methods of representing a molecule's structure.

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